diff --git a/sm4/asm_ppc64x.s b/sm4/asm_ppc64x.s
index 1023e30..840ba77 100644
--- a/sm4/asm_ppc64x.s
+++ b/sm4/asm_ppc64x.s
@@ -165,6 +165,8 @@ TEXT ·expandKeyAsm(SB),NOSPLIT,$0
 	MOVD $96, R3
 	LXVD2X (R4)(R3), M2H
 	VSPLTISB $0, ZERO // VZERO  ZERO
+	MOVD	$·rcon+0x50(SB), R4
+	LXVD2X (R4)(R0), M3
 
 	MOVD key+0(FP), R3
 	MOVD ck+8(FP), R4
@@ -183,8 +185,8 @@ TEXT ·expandKeyAsm(SB),NOSPLIT,$0
 	VSLDOI $4, V1, V1, V2
 	VSLDOI $4, V2, V2, V3
 
-	VOR ESPERMW, ESPERMW, V5
-	SM4_SBOX(V5, V6, V7)
+	VOR M3, M3, V5
+	AFFINE_TRANSFORM(M1L, M1H, V_FOUR, V5, V6, V7)
 	STXVW4X V5, (R5)
 
 /*